Engine controller based on atmospheric pressure

An engine control system comprising:

• an engine controller coupled to a fuel injector of an engine, the engine controller comprising:
• a first control device configured to determine whether the engine is in a steady state or a transient state;
• and
• a second control device configured to:
• calculate a fuel injection timing in the steady state;
• calculate a fuel injection timing in the transient state;
• calculate an atmospheric pressure correction amount according to an atmospheric pressure correction process for correcting an effect of atmospheric pressure on the fuel injection timing in the steady state;
• and
• output, to the fuel injector, a final fuel injection timing based on at least one of the fuel injection timing in the steady state, the fuel injection timing in the transient state, or the atmospheric pressure correction amount;
• and
• an atmospheric pressure sensor coupled to the engine controller and configured to detect the atmospheric pressure;
• and
• wherein, when the engine is in the transient state and when the atmospheric pressure detected by the atmospheric pressure sensor is less than or equal to a first threshold and is greater than or equal to a second threshold that is less than the first threshold, the second control device is configured to use the calculated fuel injection timing in the transient state as the final fuel injection timing.

An engine control system comprising:

• an engine controller coupled to a fuel injector of an engine, the engine controller configured to:
• calculate a steady state fuel injection timing;
• calculate a transient state fuel injection timing;
• calculate an atmospheric pressure correction amount according to an atmospheric pressure correction process for correcting an effect of atmospheric pressure on the steady state fuel injection timing;
• and
• output, to the fuel injector, a final fuel injection timing based on at least one of the steady state fuel injection timing, the transient state fuel injection timing, or the atmospheric pressure correction amount;
• wherein the engine controller is further configured to:
• when the engine is in a transient state and when the atmospheric pressure is less than or equal to a first threshold and when the atmospheric pressure is greater than or equal to a second threshold, use the calculated transient state fuel injection timing as the final fuel injection timing, wherein the first threshold is greater than the second threshold;
• and
• when the engine is in the transient state and when the atmospheric pressure is greater than the first threshold or the atmospheric pressure is less than the second threshold, correct the fuel injection timing in accordance with a second atmospheric pressure correction process, different from the atmospheric pressure correction process, to generate the final fuel injection timing.